Properties and Applications of TEN AX GC as a Column Packing Material In Gas Chromatography

Gas phase retention volume behavior of organic compounds on the sorbent poly(oxy-m-terphenyl-2',5'-ylene)

“…For a given value of log p0,293, the alcohols exhibit log Vg>293 values that are uniformly smaller than for the Figure lb compounds. This is as expected since the alcohols are comparatively hydrophilic, and Tenax-GC on the other hand is hydrophobic (28). This result may be viewed in terms of eq 12 by noting that it probably indicates smaller values of ( 8 -) for the alcohols than for the it is moderately close to -1.0 as predicted by eq 12, it is also significantly different from -1.0.…”

Effects of flow rate and temperature on the thermal desorbability of polycyclic aromatic hydrocarbons and pesticides from Tenax-GC

“…Increasing the helium desorption carrier flow rate was observed to have two beneficial effects: (1) the desorption times and temperatures required for R to achieve its maximum value were reduced substantially for the compounds fluoranthene, pyrene, benzo[fe]fluoranthene, perylene, benzo [ghi] perylene, dieldrin, DDD, and DDT; and (2) the percent recoveries for these compounds as well as those for fluorene, -BHC, and heptachlor were improved substantially.…”

“…The data presented in Figures 2 and 3 can be used in this manner to obtain estimates of the VR and N values for the analytes at certain of the desorption temperatures. These estimates can be made if (1) the first two desorptions during which analyte was recovered were at the same temperature and (2) the two sequential desorptions do not allow the recovery of all of the desorbable analyte. It is also possible to use the data from two different flow rates for the same desorption temperature if (1) that desorption temperature was the first during which that analyte was recovered and (2) the desorption at the higher flow rate does not allow the recovery of all of the desorbable analyte.…”

Purification of hydrogen from hydrocarbons by adsorption for vehicles application

“…Seven specifications with increasing polarities are available (Porapak ® P, PS, Q, QS, R, N, T). Tenax TM [23] are porous polymers based on 2,6-diphenylene oxide and mainly used for trapping of volatile compounds, with an upper temperature limit of 350 • C. Chromosorb ® is a styrene-divinylbenzene based polymer whose difunctional degree influences the size and the distribution of pores and the specific area. Porapak ® and Chromosorb ® are thermally less stable than Tenax TM , but their specific area are higher [24,25].…”